摘要
为了提升热化学储能反应器内部传热传质能力,构建了CaO/Ca(OH)_(2)热化学储能反应器内的传热传质与热化学反应的多场耦合数值计算模型,并且验证了模型的可靠性,在此基础上,为了改善传统热化学储能反应器的传热传质性能差的应用局限性,提出了在内热源热化学储能反应器中引入螺旋翅片的性能优化方法。验证了数值计算方法的有效性,深入研究了螺旋翅片的结构参数对热化学储能反应器储热性能的影响规律,研究发现螺旋翅片数量和环绕圈数对反应器内的温度分布和反应速率具有显著影响。随着螺距翅片数量和环绕圈数的增加,反应器轴向传热性能得到强化,螺旋翅片的引入增强了流体扰动,促进了传质过程,缩短了储热过程的时间,储热效率显著提升。得出了适于实际应用的翅片数和环绕圈数等螺旋翅片的参数。研究结果表明,当热化学储热反应器内的翅片数量为4、环绕圈数为1.5圈时,热化学储能反应器的性能最优,其热化学反应时间仅为355 min,与传统热化学储能反应器相比,热化学反应时间缩减幅度为85.1%,研究结果可以指导实际热化学反应器的结构设计与性能优化。
A multifield coupled numerical model of heat and mass transfer and thermochemical reaction in CaO/Ca(OH)_(2) system was constructed to enhance the heat and mass transfer capacity within a thermochemical energy storage reactor,and the reliability of the model was verified.Based on this model,a performance optimization method was proposed to overcome the poor heat and mass transfer that limits the use of traditional thermochemical energy storage reactors.This method introduces spiral fins into the internal heat source thermochemical energy storage reactor.The effectiveness of the numerical calculation method was verified,and the influence of the structural parameters of the helical fins on the thermal storage performance of the thermochemical energy storage reactor was thoroughly studied.The helical fin parameters,such as the number of fins and loops,suitable for practical applications were identified.The results show that the thermochemical energy storage reactor performs optimally when the number of fins and loops in the reactor is 4 and 1.5,respectively,with a thermochemical reaction time of only 355 min.This configuration reduces the thermochemical reaction time by 85.1%compared with traditional thermochemical energy storage reactors.These results provide valuable guidance for the structural design and performance optimization of actual thermochemical reactors.
作者
余银生
邹星宇
吕凤
高永川
万大阳
韩利涛
YU Yinsheng;ZOU Xingyu;LYU Feng;GAO Yongchuan;WAN Dayang;HAN Litao(Luoyang Ruichang Environmental Engineering Co.,Ltd.,Luoyang 471003,Henan,China;School of Mechanical and Power Engineering,Zhengzhou University,Zhengzhou 450001,Henan,China)
出处
《储能科学与技术》
北大核心
2025年第12期4770-4779,共10页
Energy Storage Science and Technology
基金
国家自然科学基金(52306118)
中国博士后面上项目(2025M776022)。
关键词
热化学储热
储能反应器
螺旋翅片
结构优化
thermochemical heat storage
energy storage reactor
spiral fins
structural optimization
